The correct answer is B) capsize. Steering a survival craft broadside to the sea (perpendicular to the waves) can cause it to become unstable and capsize. This is due to the increased risk of the waves rolling the craft over on its side, which can lead to capsizing. Broadside positioning makes the craft more susceptible to the lateral forces of the waves, compromising its stability. The other options are incorrect because: A) running faster would not necessarily lead to capsizing, C) sinking is a more extreme outcome that may not directly result from the broadside positioning, and D) running smoother is the opposite of the intended effect, which is to avoid capsizing.